GHSA-g8fc-vrcg-8vjg Constallation has pods exposed to peers in VPC

• Go github.com/edgelesssys/constellation/v2: < 2.16.3 → fixed in 2.16.3

Impact Cilium allows outside actors (`world` entity) to directly access pods with their internal pod IP, even if they are not exposed explicitly (e.g. via `LoadBalancer`). A pod that does not authenticate clients and that does not exclude `world` traffic via network policy may leak sensitive data to an attacker _inside the cloud VPC_. Patches The issue has been patched in v2.16.3. Workarounds This network policy excludes all `world` traffic. It mitigates the problem, but will also block all desired external traffic. If vulnerable pods are known, a policy can be crafted to only firewall those instead (see also https://docs.cilium.io/en/stable/security/policy/language/#access-to-from-outside-cluster). ```yaml apiVersion: "cilium.io/v2" kind: CiliumClusterwideNetworkPolicy metadata: name: "from-world-to-role-public" spec: endpointSelector: matchLabels: {} # role: public ingressDeny: • fromEntities: • world ``` References The tracking bug for a Cilium-side fix is https://github.com/cilium/cilium/issues/25626.